English LSUPage 28ß After placing the parts, please double check for correct polarity.Check the PCB tracks for solder bridges and short circuits createdby accident. This would cause faulty operation or, in the worstcase, damage. You can remove excess solder by putting a cleansoldering tip on the spot. The solder will become liquid again andflow from the soldering spot to the soldering tip.Assembling the kitYou can skip this part if you have purchased a ready-built module.PreparationPut the sorted components in front of you on your workbench. Theseparate electronic components have the following special features youshould take into account to prevent mistakes in assembling:ResistorsResistors reduce current. Their mounting orientation is of noimportance. The value of resistors for smaller power ratings(under 5 W) is indicated through colour rings. Every colourstands for another figure. The colour ring in brackets indicatesthe tolerance of the resistor which here is of no importance.Value Colour rings100 Ω brown - black - brown (gold)4,7 kΩ yellow - violet - red (gold)22 kΩ red - red - orange (gold)